Coal-feeding mechanism for magazine-furnaces.



-0. C. WOOLSON. COA-L FEEDING MECHANISM FOR MAGAZINE FURNACES.

. APPLICATION FILED DEC. 15, I908. RENEWED MAR. 27, 19l6. 1,203,167.

Patented 0053131916.

0706006. Zflaalmon, zyap fli'hrras I 0. C. WOOLSON. COAL FEEVDING MECHANISM FOR MAGAZINE FURNACES. APPLICATION FILED DIEVC. 16, 1908- RENEWED MAR. 27, 1916.

Patented 000. 31, 1916.

2sHEETs-sHEET 2.

wzznemm- COAL-FEEDING MECHANISM r012. MAGAZINE-FURNACES.

' Specification of Letters Patent.

Application filed December 16, 1908, Serial No. 467,895. Renewed March 27,1916. SeriaI'No, 87,130.

To all whom it may concern:

Be it known that I, Ono'soo C. WOOLSON, a citizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Coal-Feeding Mechanism for Magazine Furnaces, of

V which the following is a specification.

My present improvement relates to mechanism for supplying coal to furnaces, and particularly to boiler furnaces of the type in which the coal is fed in at either side from magazines located above and at the sides of the furnace chamber. This general type of boiler furnace being well knownI have not fully. illustrated the same herein, except such portions, shown in a fragmen-.

tary way, as more directly relate to my present improvements.

Oneof the principal objects of my, im-' proved coal feeding apparatus isto supply coal from a chute, located forward or out- \side of the front wall ofthe furnace hous- ..ing, and to carry the coal horizontally and backwardly along the top of the magazine {until the coal shall be properly supplied to the magazine, even to the rear end-thereof; a further object being to provide this apparatus so organized that it can be readily removed for inspection and repair, and for renewal from time to time as required.

For this purpose I have organized several' component members of the apparatus upon a connecting framework in the nature of a carrier, and have arranged this to'be slid out upon suitablev lugs or supports at the sides of the magazine, preferably near the upper portion thereof, and havealso an ranged the several details in such manner that these are supported and carried upon the said carrier whereby the-whole operative mechanism can be withdrawn in the cated.

a furnace equipped with my'improvement Fig. 3 is a cross sectional view of the feeder and also of portions of the magazine grate, arched roof and stoker. Fig. 4 is a detail of an actuator for the clutch. Fig. 5 is a detail partly in section of the driving mechanism showing the clutch disengaged; and Fig. 6 is a sectional view of the same parts showing the clutch engaged.

In these drawings two guide rails or Patented Oct. 31, was.

it f D PANUFF1QE,'

- a oaosco c. wooLsoN, or EWARK, NEWJERSEY.

frame members are illustrated, designated by the reference characters ll-11, which' are slidably supported upon the fixed guides 111-111,jall of said members being shown as extending from the front to the extreme rear end of the feedmechanism. At the front end these guide members carry a front plate or frame of some suitable .construct1on, as for instance the frame 12, and forwardly of said frame I have shown gearing 13, 1% suitable for operating a screw indicated in a general way by 15 whose shaft 16' is journaled at 17 in the said front plate or member, and whose rearward-end is journaledin a bearing 18 attached toand:

between the said rails 11-'11.

v A regulator device, in the present instance shown'in the form ofa swinging plate 19' is suitably supported for movement to and fro, preferably by means of a pivot 20, by which it may be hinged to the said removable framework of the apparatus.

The relation of this regulator device should" be such that when the coal is pushed along,

as indicated by the arrow 21 in Fig. 1, the

backward movement of the regulator when thus pushed or operated by the-coal excessively accumulating at the rearend of the magazine chamber 22 will operate through some suitable connection, as'for instance the rod 23 shown pivoted to said regulator at- 24 for controlling or disengaging thescrew driving mechanism shown at the left hand in Fig. 1. In the present instance, I have shown this. accomplished by means of suitable connection. to the said rod, as for '1 instancelthe lever 25, pivoted at 26 to the] rod and at 260to the'frame, carrying a pair of pins 27 running in a groove in the hub 28 of the sprocketwheel 29. The result of this arrangement when organized in .the

manner illustrated, isto cause the said regulator, when it is pushed backwardly atits lower end, to push forward the said sprocket wheel on the sleeve 30 of the pinion 13, and

thereby disengage the clutch teeth 31 by g which the said sprocket wheel when in its working position engages with the teeth32.

on said pinion for driving the pinion 13 and through it the pinion 14 which is fixed able manual actuator when the sprocket wheel is disengaged as aboveset forth. A

suitable. crank for this purpose is illustrated in the drawings by the dotted line 33, so that an operator or attendant may turn the feed screw by hand. :lhis can be readily ldone under-ordinary circumstances when the driving connection is disengaged.

Eat the forward'end of the apparatus a floor surface, preferably in a concave form, or trough shaped, indicated by '34, is fixed in place under the feed screw. This receives the coal which comes down from the supply chute 35 into the spaces between the turns of the feed screw. The sides of this trough 34 are shown carried up to join the afore said guide rails 11 to'which the edges of the trough are shown attached by riveting. The said trough 34 is carried backward to a point proper for regulating the/ position of the forward part of the mass of coal which is ordinarily.contained within the magazine while thefurnace is in operation. In the present illustration the trough, is provided with two discharge mouths 36, 37, for the the coal from the more even distribution of screw.

For indicating the manner in which the coal is ordinarily, or frequently in practice,

to thegrate of the furnace, l have indicated the usual reciprocatory feed .device, indicated in a generalway by A, and also the oscillating segment by which this device is sometimes actuated; vbut as these features are already well known in the art it is deemed unnecessary to further illustrate or describe the operation of those details in this application. I

For retaining the feed mechanism in place two bolts are shown at 40 and 41 by removing which the said front plate or bearing piece (this being securely fixed to th aforesaid guide rails) permits the entire mechanism to be drawn out at the front of the furnace, including the feed screw, its rear bearing, and the regulator carried son the'rearward end of the said framework.

In Fig. 1, byway of illustrating the usual relation of the top plate 42 of the magazine to the tubes of a'water tube boiler, the position of the latter is indicated at 43. A standard form of water tube of a water tube I zine chamber.

ber the usual 'door or doors, indicated at 46 are shown for closing the tront of the magazine chamber below the feed mechanism for closing the front end of the magait will be remembered that in this class of furnaces it is occasionally necessary to open this door and withdraw a the coal which may have bee-n accumulated in the chamber. During this operation the said feed trough underneath the screw at If the coal, represented at 50, accumu-.

lates excessively at therear portion, and its action on the clutch actuator etfectsa slowjand even movement of thelever 25, and through it a slow disengagement of the clutch teeth 3132,.these will unduly" wear away at their ends. F or effecting a rapid and positive disengagement of clutch members after they have been moved a predetermined distance, I have illustrated a lever 51 pivoted to the frame 12, and having a roller 52 ridingupon a cam face 53 carried by the lever 25, a coil spring 54 is employed for drawing the roller 52 over the cam face after the lever 25 has been moved far enough to permit the roller to pass of? of the detaining portion 53 of the cam. When the lever 2'5 is moved either by the actuator 19, or by the handle 55 on the lever 25 far enough to move the detaining portion 53 of the cam out of engagement with the roller 52- the spring will cause such roller. to traverse the cam and force the clutch members apart and thus-cut off the supply of coal, when it is desired to resume the lee feeding. the lever 51 will be returned to its normal or idle position, thismay be doneby a handle 56, carried by the lever 51, and if the actuator. 19 is not sufficiently overbalanced to drop when thepart s are released the handle 55 may be employed for restoring the actuator to position and placing the clutch members in engagement.

-In the present illustration there are three stoke boxes A working transversely of the magazine and of the guide rails which support the feeder trough. When there are a plurality of stokrsfwhich in the present illustration are illustrated as stoke boxes A, itis desirable that the coal should be fed to the same evenly and uniformly, and i 'as for instance a single stoke boi will be employed, and it is' even then desirable that the coal should be evenly and uniformly fed to this stoking device. improvement is particularly adapted for distributing the accumulation of-coal evenly throughout the magazine and carrying this well to the back end.

'Havlng described my invention I claimi 1. The combination with a stoker magazine having a pair of longitudinally dis posed supporting members and an opening in line with the supporting members, of a coal chute, a feeder comprising a chute connection and a coal distributer trough, said trough having a )ortion below the mouth of said chute, saic portion constituting one part of the front closure for the furnace thereof and a portion constructed Y and adapted for passing through. such opening,

' and a conveyer in suchtrough for passing coal therethrough and constituting the other part of the front closure, such trough having on opposite sides thereof means forenazine and acting in the magazine transversely of such guide rails, a feeder having a frame, means for connecting the same to a coal chute, a trough carried by the frame' and constructed and adapted for engaging the guide rails and being supported in a horizontal position thereby, the lower portion of said-trough'being provided with a number of openings, a bearing in the frame,- a bearing carriedby the inner end of the trough, a hollow shaft journaled in said bearings, ascrew upon the shaft and in said trough, gearingfor driving saiid shaft, a

- pulley, a pair of clutch members between the pulley and the gearing, a lever con nectedto one of the clutch members, a bar- 1 traversing the hollow shaft, a fuel actuated plate dependent in themagazine'and pivoted to the trough.beyondtheshaft-bearing and also pivoted to the bar, means for connecting said bar to the clutch-connected lever, said clutch connectedlever being provided with v a releasing farceand a cam face, a spring actuatedlever having a roller for engagingv said faces-for accelerating the clutch dis-I,

- engagement after a predetermined move- ,ment of the saidfuel actuated plate, and

means for manually actuating thefsaid le-{ vers andgearing.

" 3. In a device of the character set forth the combinatlonflwith a stoker magazine,of a plurality of stokers disposed at various positions vlongitudinally of the magazine, a

. coal chute, a feeder having a frame, means for connecting the same, to'the coal chute,

This present a trough carried by the frame and having a portion below the mouth of the chute and a portion supported in a horizontal position within the magazine, the portion of said trough within the magazine belng provided I with a number of openings, a screw n said trougln'gearing for driving said screw, a

pulley, a'pair of clutch'members between the pulley and the gearing, a lever connected to one of the clutch members, a bar, a fuel actuated plate pivotally supported in the magazine and pivoted to the bar for causing the disengagement of the clutch upon a predetermined movement of the said-members. 4. The combination with stoker feeding means, of driving means for the feeding means, a pair of clutch members between the driving means and the feeding means,

' coal engaging means, connecting. means he I tween said coal enga ing means and one of -.the clutch members or effecting the disengagementiof the clutch upon accumulation of coal, and means constructed and adapted for release-upon the inauguration of the clutch disengagement for accelerating such for the purposes specified.

clutch disengagement, substantially'as and 5. The combination with a stoker feed screw, of driving means for the screw, a

pair of clutch members between the saidscrew and the said driving means, a lever connected to one of the clutch members, a

coal engaging plate connected tothe clutch connected-lever, said clutch connected-lever being provided with a releasing face and a-cam face, and a spring actuated lever having a roller for engaging said faces for ac celerating the clutch disengagement after a predetermined movement of the said plate- 6. The. combination with a stoker magadriving means for the said screw, a pair of clutch members between the driving means and the screw, a "lever connected to one of the clutch members, a bar, plate pivotally supported in the magazine and pivoted to the bar, means for connecting said bar to the clutch connected-lever, and

- zine, of a trough, ascrew in said trough,

means active upon said clutch connectedlever for accelerating the clutch disengagement upon a predetermined movement'of the said plate. 1

7. The combination with astoker magazine having-a trough carried by theframe,

the lower portion of said trough being rovidedwith an opening, a hollow 'sha t, a;

- screwupon the"sh'a ft and 'located [in said trough gearing for drivingsaid shaft, a i

"pulley, a pair of clutch. members between the pulley and the gearing-a lever connected. to one of the clutch -members, a bar traversing the hollow shaft, a dependent plate piv oted to the trough and also pivoted to the bar, means for connecting said "bar to the clutch connected-lever, said clutch connected-lever being provided with a'releasing York, N. Y., this eleventh day of December,

face and a cam face, and a spring actuated 1908. 'lever having a roller for engaging said faces for accelerating the clutch disengagement I 5 after a predetermined movement of the said Witnesses:

plate. CHAS. LYON RUSSELL,

Signed at Nos. 9-15 Murray St, New FRED. J. DOLE.

OROSCO C. VVOOLSON. 

